Debugging in Kubernetes CKAD Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   You need to copy a configuration file from your local machine into a running container to test a change. Which command should you use?

   • Akubectl port-forward <pod-name> 8080:80
   • Bkubectl cp ./config.yaml <pod-name>:/etc/config.yaml
   • Ckubectl exec -it <pod-name> -- cp ./config.yaml /etc/config.yaml
   • Dkubectl logs <pod-name>
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2. 2application · medium

   You need to update a configuration file inside a running pod named config-0. The file is located at /etc/config/settings.ini. You have a corrected version on your local machine at ./settings.ini. Which command should you use to replace the file in the pod?

   • Akubectl logs config-0 --tail=0
   • Bkubectl port-forward config-0 8080:8080
   • Ckubectl exec -it config-0 -- cat > /etc/config/settings.ini < ./settings.ini
   • Dkubectl cp ./settings.ini config-0:/etc/config/settings.ini
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4. 3application · medium

   A pod named scheduler-test is not being scheduled. You have verified that the pod's YAML is correct and there are no taints on the nodes. Which command would show you the most recent scheduling events for this pod?

   • Akubectl logs scheduler-test
   • Bkubectl top pod scheduler-test
   • Ckubectl exec -it scheduler-test -- /bin/sh
   • Dkubectl get events --field-selector involvedObject.name=scheduler-test
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5. 4expert · hard

   A pod named db-1 is in a CrashLoopBackOff state. You have checked the logs and they show no errors. You have also checked the pod's resource usage with kubectl top and it shows the pod is using very little CPU and memory. You suspect the issue may be related to a failed liveness probe. Which command would provide the most direct evidence of this?

   • Akubectl logs db-1 --previous
   • Bkubectl describe pod db-1
   • Ckubectl exec -it db-1 -- /bin/sh
   • Dkubectl top pod db-1
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6. 5expert · hard

   A pod named legacy-app is running but is not responding. The container image is old and does not include any debugging tools. You need to inspect the process list and network connections from within the pod's network namespace, but you must not modify the running container. Which command should you use?

   • Akubectl cp /bin/ps legacy-app:/tmp/ps && kubectl exec -it legacy-app -- /tmp/ps
   • Bkubectl debug legacy-app -it --image=nicolaka/netshoot --target=legacy-app
   • Ckubectl port-forward legacy-app 8080:8080
   • Dkubectl exec -it legacy-app -- ps aux
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